真空脱水对水泥混凝土地坪强度影响的应用研究  

Application of Vacuum-dewater on Strength Influence of Cement Concrete Floor

作　　者：董恒瑞 邓铃夕[3] 李城 陈敬 李斯祺 石从黎 

机构地区：[1]重庆市建筑材料与制品工程技术研究中心,重庆401122 [2]重庆建工新型建材有限公司,重庆401122 [3]重庆大学材料科学与工程学院,重庆400045

出　　处：《重庆建筑》2016年第11期61-63,共3页Chongqing Architecture

摘　　要：混凝土经真空脱水后打破原有"固‐液‐气"三相平衡体系,引起混凝土强度、表观密度、含气量等指标参数的改变。通过采用"上脱水"式真空处理工艺对水泥混凝土试验地坪进行真空脱水,研究了不同部位混凝土28d强度的变化情况,并分析经真空脱水后混凝土内部体系组分的变化与强度值波动的规律。试验结果显示:真空脱水后不同部位混凝土强度变化较大,强度受设计强度、脱水真空度、真空影响深度及脱水处理时间的综合影响。The concrete equilibrium system of Solid-liquid-gas is broken after vacuum dehydration, causing changes in index parameters like compressive strength, apparent density and gas content. The ＂upper dehydration＂ vacuum treatment technique is adopted for cement concrete testing floor to study the variation situation of concrete 28d strength of different locations and analyze the interior systematic changes and strength variation rule of vacuum-dewatered concrete. The results show that the strength of different concrete parts changes dramatically after vacuum dehydration, and the strength is affected by the comprehensive action of design strength, vacuum-dewater degree, vacuum influential degree and dewater treatment time.

关 键 词：真空脱水 水平层位 垂直层位 表观密度 

分 类 号：TU528[建筑科学—建筑技术科学]